Prevent NaCl proxy from closing the handle by bumping the ref count.

ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc	(revision 125068)
+++ ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc	(working copy)
@@ -387,7 +387,9 @@
       GetTransferBuffer(resource_id, id, &native_handle, &native_size);
   desc_wrapper.reset(factory.ImportShmHandle(
       (NaClHandle)native_handle, native_size));
-  *shm_desc = desc_wrapper->desc();
+  // todo(nfullagar): Dup the handle instead of leak caused by bumping the ref.
+  // bug: https://chromiumcodereview.appspot.com/9610008
+  *shm_desc = NaClDescRef(desc_wrapper->desc());
   *shm_size = native_size;
   rpc->result = NACL_SRPC_RESULT_OK;